import {
  document,
	window,
	HTMLCanvasElement,
	requestAnimationFrame,
	cancelAnimationFrame,
core,
	Event,
  Event0
} from "dhtml-weixin"
import * as THREE from './three/Three';

import Stats from 'three/addons/libs/stats.module.js';

import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
import { OrbitControls0 } from 'three/addons/controls/OrbitControls0.js';
import { FBXLoader } from 'three/addons/loaders/FBXLoader.js';
var requestId
Page({
  onShareAppMessage(){
    return getApp().onShare()
  },
  onShareTimeline(){
     return {title:"ThreeX 2.0"}
  },
	onUnload() {
		cancelAnimationFrame(requestId, this.canvas)
		this.worker && this.worker.terminate()
if(this.canvas) this.canvas = null
		setTimeout(() => {
			if (this.renderer instanceof THREE.WebGLRenderer) {
				this.renderer.dispose()
				this.renderer.forceContextLoss()
				this.renderer.context = null
				this.renderer.domElement = null
				this.renderer = null
			}
		}, 0)
	},
  webgl_touch(e){
		const web_e = (window.platform=="devtools"?Event:Event0).fix(e)
		this.canvas.dispatchEvent(web_e)
  },
  onLoad() {
		document.createElementAsync("canvas", "webgl2").then(canvas => {
      this.canvas = canvas
      this.body_load(canvas).then()
    })
  },
  async body_load(canvas3d) {

    let camera, scene, renderer, stats;

    const clock = new THREE.Clock();

    let mixer;

    init();
    animate();

    function init() {

      const container = document.createElement( 'div' );
      document.body.appendChild( container );

      camera = new THREE.PerspectiveCamera( 45, window.innerWidth / window.innerHeight, 1, 2000 );
      camera.position.set( 100, 200, 300 );

      scene = new THREE.Scene();
      scene.background = new THREE.Color( 0xa0a0a0 );
      scene.fog = new THREE.Fog( 0xa0a0a0, 200, 1000 );

      const hemiLight = new THREE.HemisphereLight( 0xffffff, 0x444444, 5 );
      hemiLight.position.set( 0, 200, 0 );
      scene.add( hemiLight );

      const dirLight = new THREE.DirectionalLight( 0xffffff, 5 );
      dirLight.position.set( 0, 200, 100 );
      dirLight.castShadow = true;
      dirLight.shadow.camera.top = 180;
      dirLight.shadow.camera.bottom = - 100;
      dirLight.shadow.camera.left = - 120;
      dirLight.shadow.camera.right = 120;
      scene.add( dirLight );

      // scene.add( new THREE.CameraHelper( dirLight.shadow.camera ) );

      // ground
      const mesh = new THREE.Mesh( new THREE.PlaneGeometry( 2000, 2000 ), new THREE.MeshPhongMaterial( { color: 0x999999, depthWrite: false } ) );
      mesh.rotation.x = - Math.PI / 2;
      mesh.receiveShadow = true;
      scene.add( mesh );

      const grid = new THREE.GridHelper( 2000, 20, 0x000000, 0x000000 );
      grid.material.opacity = 0.2;
      grid.material.transparent = true;
      scene.add( grid );

      // model
      const loader = new FBXLoader();
      loader.load( 'models/fbx/Samba Dancing.fbx', function ( object ) {

        mixer = new THREE.AnimationMixer( object );

        const action = mixer.clipAction( object.animations[ 0 ] );
        action.play();

        object.traverse( function ( child ) {

          if ( child.isMesh ) {

            child.castShadow = true;
            child.receiveShadow = true;

          }

        } );

        scene.add( object );

      } );

      renderer = new THREE.WebGLRenderer( { antialias: true } );
      renderer.setPixelRatio( window.devicePixelRatio );
      renderer.setSize( window.innerWidth, window.innerHeight );
      renderer.shadowMap.enabled = true;
      container.appendChild( renderer.domElement );

      const controls = new (window.platform=="devtools"?OrbitControls:OrbitControls0)( camera, renderer.domElement );
      controls.target.set( 0, 100, 0 );
      controls.update();

      window.addEventListener( 'resize', onWindowResize );

      // stats
      stats = new Stats();
      container.appendChild( stats.dom );

    }

    function onWindowResize() {

      camera.aspect = window.innerWidth / window.innerHeight;
      camera.updateProjectionMatrix();

      renderer.setSize( window.innerWidth, window.innerHeight );

    }

    //

    function animate() {

      requestId = requestAnimationFrame( animate );

      const delta = clock.getDelta();

      if ( mixer ) mixer.update( delta );

      renderer.render( scene, camera );

      stats.update();

    }

  }
})